<template>
  <div v-if="Object.keys(detailInfo).length !== 0" class="goods-info">
    <div class="info-desc clear-fix">
      <div class="start"></div>
      <div class="desc">{{detailInfo.desc}}</div>
      <div class="end"></div>
    </div>
    <div class="info-key">{{detailInfo.detailImage[0].key}}</div>
    <div class="info-list">
      <img v-for="(item,index) in detailInfo.detailImage[0].list" 
           :src="item" :key="index" @load="imgLoad">
    </div>
  </div>
</template>

<script>
  export default {
    name: 'DetailGoodsInfo',
    props: {
      detailInfo: {
        type: Object
      }
    },
    data() {
      return {
        counter: 0,
        imagesLength: 0
      }
    },
    methods: {
      imgLoad(){
        if(++this.counter === this.imagesLength){
          // 加一层判断，否则发送次数由图片数量而定
          // 这里只需要在图片加载完成后发送一次
          this.$emit('imageLoad');
        }
      }
    },
    // 监听detailInfo属性的变化
    watch: {
      detailInfo() {
        // 获取图片个数
        this.imagesLength = this.detailInfo.detailImage[0].list.length;
      }
    }
  }
</script>

<style scoped>
  .goods-info{
    padding: 20px 0;
    border-bottom: 5px solid #f2f5f8;
  }

  .info-desc{
    padding: 0 15px;
  }

  .info-desc .start, .info-desc .end{
    width: 90px;
    height: 1px;
    background-color: #a3a3a5;
    position: relative;
  }

  .info-desc .start{
    float: left;
  }

  .info-desc .end{
    float: right;
  }

  .info-desc .start::before, .info-desc .end::after{
    content: '';
    position: absolute;
    width: 5px;
    height: 5px;
    background-color: #333;
    bottom: 0;
  }

  .info-desc .end::after{
    right: 0;
  }

  .info-desc .desc{
    padding: 15px 0;
    font-size: 15px;
  }

  .info-key{
    text-align: center;
  }

  .info-list img{
    width: 100%;
  }

</style>